The following seems to be a bug of FORMAT.

> (format "~8,3F" 3.4569e15)
"3.456e+15"
> (format "~8,3F" 3.4569)
"   3.457"
> (format "~8,2F" 3.456e15)
"3.45e+15"
> (format "~8,2F" 3.456)
"    3.46"

--
INITERM